A set of protocols that allow systems to communicate information about the state of services on other systems (For example, ICMP is used in determining whether systems are up, maximum packet sizes on links, whether a destination host/network/port is available. Hackers typically use (abuse) ICMP to determine information about the remote site)

IT, abrev.

ICMP

telecom., abrev.

ICMP (IETF)

Internet Control Message Protocol A required maintenance protocol in the TCP/IP suite that reports errors and allows simple connectivity. ICMP is used by the Ping tool to perform TCP/IP troubleshooting

abrev., micr.

ICMP (Internet Control Message Protocol)